Using last 2 months.

Sale 1:

Sold for 8 keys + 2 ref (~8 keys)

https://backpack.tf/profiles/76561198850121720#!/compare/1701820800/1701907200

https://backpack.tf/profiles/76561198088316707#!/compare/1701820800/1701907200

https://backpack.tf/item/6088731827

= 8 keys

Sale 2:

Sold with some scrap for 8 keys + 4 ref (~8 keys)

https://backpack.tf/profiles/76561198890990852#!/compare/1702857600/1702944000

https://backpack.tf/profiles/76561198279703584#!/compare/1702857600/1703030400 - all keys and metal visible here

https://backpack.tf/item/1541059420

https://backpack.tf/item/13767789793

https://backpack.tf/item/13845465737

https://backpack.tf/item/13823522195

https://backpack.tf/item/13837841593 - the metal

= 8 keys

Sale 3:

Sold to a bot for 7 keys + 11.77 ref (~7 keys)

https://backpack.tf/profiles/76561198088316707#!/compare/1702771200/1702857600

https://backpack.tf/profiles/76561198890990852#!/compare/1702684800/1702771200

https://backpack.tf/item/6088731827

The seller doesn't appear in the key's history because they went towards the DBD Trilby that appears on the seller's end before the keys were scanned in their backpack.

https://backpack.tf/item/13621296572

https://backpack.tf/item/8427273963

https://backpack.tf/item/13195279999

https://backpack.tf/item/13695151514

https://backpack.tf/item/12873241896

https://backpack.tf/item/9932128577

https://backpack.tf/item/12993639260 - keys (went to ScrapyardBot)

https://backpack.tf/item/7955825206 - trilby (came from ScrapyardBot)

= 7 keys

Sale 4:

Sold to a bot for 7 keys + 11 ref (~7 keys)

https://backpack.tf/profiles/76561199005039000#!/compare/1702598400/1702857600

https://backpack.tf/profiles/76561198890990852#!/compare/1702771200/1702857600 - metal only found here

https://backpack.tf/item/1541059420

= 7 keys

Other Sales:

#1

https://backpack.tf/profiles/76561199026390261#!/compare/1700611200/1700697600

https://backpack.tf/profiles/76561198051593311#!/compare/1699488000/1700784000

https://backpack.tf/item/13095576618

Untraceable

#2

https://backpack.tf/profiles/76561198097968479#!/compare/1701388800/1701475200

https://backpack.tf/profiles/76561198850121720#!/compare/1701302400/1701388800

https://backpack.tf/item/6088731827

Untraceable

#3

https://backpack.tf/profiles/76561198890990852#!/compare/1702857600/1702944000

https://backpack.tf/profiles/76561198311498888#!/compare/1702857600/1702944000

https://backpack.tf/item/6088731827

Untraceable. 6 keys and some metal match.

#4

https://backpack.tf/profiles/76561198311498888#!/compare/1703116800/1703203200

https://backpack.tf/profiles/76561199163644048#!/compare/1702512000/1703203200

https://backpack.tf/item/6088731827

Untraceable

#5

https://backpack.tf/profiles/76561198054159742#!/compare/1703030400/1703808000

https://backpack.tf/profiles/76561198047971773#!/compare/1703721600/1703808000

https://backpack.tf/item/5962836236

Untraceable, maybe bulk. Maybe the "seller" is the buyer's alt. Can't confirm anything.

#6

https://backpack.tf/profiles/76561198279703584#!/compare/1703376000/1703980800

https://backpack.tf/profiles/76561199026390261#!/compare/1703376000/1703462400

https://backpack.tf/item/1541059420

Untraceable/bulk

#7

https://backpack.tf/profiles/76561197993151025#!/compare/1702080000/1702166400

https://backpack.tf/profiles/76561199125108615#!/compare/1702080000/1702166400

https://backpack.tf/item/1486474767

https://gladiator.tf/sales?item=Holy%20Grail%20Shred%20Alert&at=2023-12-10T09:33:54.532Z - labelled as 7 keys + 43.44 ref

Untraceable

https://backpack.tf/item/13808080312 - wasn't unusual at the time

https://backpack.tf/item/2415853924 - mannco

Unconfirmed Gladiator Sales:

https://gladiator.tf/sales?item=Holy%20Grail%20Shred%20Alert&at=2023-12-09T09:33:54.532Z - December 9th

7 keys + 42.11 ref

https://gladiator.tf/sales?item=Holy%20Grail%20Shred%20Alert&at=2023-11-08T09:37:56.664Z - November 8th

6 keys + 11.11 ref

Sellers:

https://imgur.com/a/vUKvaP5

https://backpack.tf/item/5962836236 - 10 keys

https://backpack.tf/item/12621546108 - marketplace

Sales at:

7 (2x)

8 (2x)

We have a handful of sales under 8 keys, if you include the 3 gladiator sales. Can't ignore them all. There are no buyers at ~7 keys to counter the 7 key purchases anyway.

Going with 7-8.